ELGi EGRD 600 - Connection to the Cooling Water Network (Water-Cooled)

Installation
EGRD 600 – 2900 13 – EN
4.7 Connection to the cooling water network (Water-Cooled)
Operations to be performed by qualified personnel only.
Never work on system under pressure.
The user is responsible to ensure that the dryer will never be operated with pressure exceeding the
maximum pressure rating on the unit data tag.
Over-pressurizing the dryer could be dangerous for both the operator and the unit.
The temperature and the amount of cooling water must comply with the limits indicated on the technical
characteristics chart. The cross section of the connection pipes, preferably flexible, must be free from rust,
chips and other impurities. We recommend to use connecting pipes able to insulate the dryer from possible
vibrations originating from the line (flexible hoses, vibration damping fittings, etc.).
We recommend the installation of a 500 micron filter to prevent a clogging of the heat exchanger.
Minimum cooling water requirements:
Temperature
59…86°F (15…30°C) (1)
HCO
3
/ SO
4
>1.0 mg/l or ppm
Pressure
44...145 psig (3…10 barg) (2)
NH
3
<2 mg/l or ppm
Head pressure
> 44 psig (3 bar) (2) (3)
Cl
-
50 mg/l or ppm
Total hardness
6.0…15 dH°
Cl
2
0.5 mg/l or ppm
PH
7.5…9.0
H
2
S <0.05 mg/l or ppm
Conductivity
10…500 μS/cm
CO
2
<5 mg/l or ppm
Residual solid particles
<30 mg/l or ppm
NO
3
<100 mg/l or ppm
Saturation Index SI
-0.2 < 0 < 0.2
Fe <0.2 mg/l or ppm
HCO
3
70…300 mg/l or ppm
Al <0.2 mg/l or ppm
SO
4
2-
<70 mg/l or ppm
Mn <0.1 mg/l or ppm
Note : (1) – Other temperature on request - Check the data shown on the identification plate.
(2) – Other pressure on request - Check the data shown on the identification plate.
(3) – Pressure difference at dryer water connection points at maximum water flow - Other head pressure on
request
CAUTION :
PIPING THE DRYER, INLET/OUTLET CONNECTIONS MUST BE SUPPORTED AS
SHOWN IN THE DIAGRAM.
FAILING WILL RESULT IN DAMAGE.